I may not have been clear in the intent of my last post to you.My apologies.What I was trying to get across is that the state archives may have a record of where they obtained the information on Antonio Ferro. It may be filed separately from the file you saw.I have worked some with the university archives in my home town and found that sometimes they do keep a paper trail of where they obtained information. I am not sure what the FOGLIO MATRICOLARE is.My translation program comes up with it being a list or register; perhaps it is what I am suggesting you inquire the archives staff about or it is a list names which includes the information you provide on A. Ferro. If you can find out where the archives got the info you could possible back track on the sources from there.The original information had to come from some where and that would be where A. Ferro was last alive. My understanding is the Germans kept good records.